On 21/07/2020 14:46, Tzung-Bi Shih wrote: > Hi, I got a rk3399-gru-kevin and can reproduce the issue. > > Could you take a try on the proposed patch here > https://patchwork.kernel.org/patch/11675533/ to see if it fixes? It does eliminate the pops, thanks. (I've replied to the patch, I am sending this for completeness as the Cc list isn't exactly the same.)